代码如下：

<!DOCTYPE html>
<html lang="en">
 <head>
	 <meta charset="UTF-8" />
	 <meta name="viewport" content="width=device-width, initial-scale=1.0" />
	 <meta http-equiv="X-UA-Compatible" content="ie=edge" />
	 <title>Document</title>   
	 <script src="vue.js"></script>
</head>
<body>	 
	<div id="app">
		<input type="text" v-model="txt" />
		 <ul>
			 <li v-for="item in list">{{ item }}</li>
		</ul>
	 </div>
	 <script>
	 var app = new Vue({
	 	el: "#app",
	 	data: {
	 		txt: "",
	 		arr: [
	 			"苹果",
	 			"哈密瓜", 
	 			"西瓜",     
	 			"芒果",      
	 			"瓜子",      
	 			"橘子",      
	 			"火龙果",      
	 			"西瓜",        
	 			"南瓜"
	 		      ]
	 		     },
	 		  computed: {   
	 		 	 list() {
	 		 	 	var arr1 = [];
	 		 	 	var _this = this;
	 		 		 this.arr.map(function(item) {
	 		 			 if (item.indexOf(_this.txt) != -1) {
	 		 			 	arr1.push(item);
	 		 			 }
	 		 		});
	 		 		return arr1;
	 		 	}
	 		 }
	 	 });
	</script> 
  </body>
</html>
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